Questions tagged [sudo]

The sudo command allows users to run programs with the privileges of a different user (normally the root user). Use this tag for questions related to configuring and using the sudo command.

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Vagrant Up and annoying NFS password asking

Sorry for the language mistakes I've made. I'm trying to prevent vagrant asking the password when it mounts shared folders by NFS: [server] Exporting NFS shared folders... Preparing to edit /etc/...
Timur Fayzrakhmanov's user avatar
20 votes
2 answers
4k views

How do I prevent access to shutdown but not reboot?

I have a ubuntu pc running as a plex server. How do I get it so that no one can shutdown the computer but only allow the user to reboot the machine? I know it is possible in windows but I am just ...
David Holland's user avatar
20 votes
2 answers
58k views

How to allow execution without prompting for password using sudo?

I am writing a Java application where i need to do a command line execution and get a result back, but when i execute the command, it ask for sudo password. So far i tried: $ sudo -s $ vim /etc/...
user avatar
20 votes
3 answers
6k views

Is there a desktop-neutral gksudo?

There are various tools for various desktops that aim to run a graphical application as root. gksudo, kdesudo, empower, etc... But what if I'm writing a script that could be used on any Linux desktop?...
Oli's user avatar
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20 votes
2 answers
19k views

"sudo cd ..." one-liner? [duplicate]

Occasionally I want to cd into a directory where my user does not have permission, so I resort to sudo. The obvious command sudo cd somedir doesn't work: $ sudo mkdir test $ sudo chmod go-rxw test $ ...
j-g-faustus's user avatar
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20 votes
2 answers
31k views

How do I update sudo package version?

With the news of the vulnerability found in sudo versions prior to 1.8.28, I am trying to upgrade to that version, but have had no luck. I did sudo apt-get update and sudo apt-get upgrade and sudo ...
bitterman's user avatar
  • 333
20 votes
1 answer
92k views

Error: "dpkg was interrupted, you must manually run 'sudo dpkg --configure -a' to correct the problem" [duplicate]

I think I used something involving dpkg but I am not able to recall what. After that when I need to do some sudo-apt get or even sudo-apt get update I am facing the following ...
gm1's user avatar
  • 311
20 votes
2 answers
75k views

When I use sudo pip to install software I get the message "the directory... is not owned by the current user"

The directory '/home/bijay/.cache/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If ...
Bijay uprety's user avatar
19 votes
4 answers
119k views

Sudo comes up with an error, cannot run anything as root

For some reason, when I try to run any programs (I am trying to run a rootkit hunter: rkhunter) as root on the command line with sudo like this: sudo rkhunter Then I get this message: You must be ...
ScriptKitty's user avatar
19 votes
2 answers
8k views

Can anyone explain why sudo ls with a wildcard doesn't work?

$ sudo -iu abc ls -ltr /sites/servers/server_instance/logs/access* ls: cannot access /sites/servers/server_instance/logs/access*: No such file or directory $ sudo -iu abc ls -ltr /sites/servers/...
Faisal's user avatar
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19 votes
2 answers
14k views

warning message at command line `sudo`

Everytime I try to sudo something at the terminal, I get a warning message: alexandre@XPS-15Z $ sudo mount file.iso /mnt/ -o loop [sudo] password for alexandre: no talloc stackframe at ../source3/...
Alexandre's user avatar
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19 votes
1 answer
16k views

How to make 'sudo' grab the password from a file?

I want to run a command that requires the sudo password say: sudo apt-get update Isn't this supposed to work (I have stored the password in a normal text file passwd.txt): sudo apt-get update <~/...
MichaelB's user avatar
  • 335
19 votes
2 answers
43k views

Error, even with sudo: "dd: failed to open ‘/dev/sda1’: Permission denied" (dd input piped from gzip)

My command which doesn't work: sudo gzip -dc sda1.image.gz | dd of=/dev/sda1 returns the following error even before I've had a chance to enter my password: dd: failed to open ‘/dev/sda1’: ...
Ken Conrad's user avatar
19 votes
4 answers
129k views

What is 'sudo tar -xzf'? Why it is used?

I need to know the extensions of xzf and its usage. Is it necessarily to be used in installing a software? sudo tar -xzf utorrent-server-3.0-ubuntu-10.10-27079.tar.gz Why this is used?
Bharath's user avatar
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19 votes
3 answers
17k views

What is the equivalent of gksudo in Kubuntu/KDE?

In regular Ubuntu (Unity/Gnome), I use gksudo to run GUI programs with root privileges. I'm trying out Kubuntu (or KDE) now -- what do I use?
ish's user avatar
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19 votes
2 answers
408k views

Installing apt-get

The apt-get command and the sudo command does not work for me. which apt-get returns nothing. I checked by bin folder to make sure, and there is no aptget. I however have wget. Can I install apt-get ...
user3078335's user avatar
19 votes
3 answers
55k views

sudo: unknown uid xxxxx: who are you?

I was using ssh and trying to upgrade a system from Ubuntu 10.04 to 12.04. The connection had an issue so I had to login again to finish the upgrade. After running sudo dpkg --configure -a that was ...
Geeky's user avatar
  • 191
19 votes
2 answers
71k views

sudo: unable to resolve host ubuntu-server [duplicate]

Every time I try to use sudo I get this: sudo: unable to resolve host ubuntu-server My /etc/hosts file: 127.0.0.1 localhost 127.0.1.1 ubuntu-server # The following lines are desirable ...
Manfred Van de Waarsenburg's user avatar
18 votes
5 answers
328k views

How to run applications as root?

I am having some strange issue with Kate and Kwrite. When I click on Open File, it crashes with segmentation fault. I am a complete newbie to Linux, and I think the issue is that I am not running ...
Alex Gordon's user avatar
18 votes
1 answer
101k views

Shutdown over SSH [duplicate]

I just installed a fresh ubuntu server 12.04. I log in over SSH and use sudo -s to get root access. Then I use shutdown now and the server closes the connection. I cannot access the server over SSH, ...
user avatar
18 votes
2 answers
14k views

Why doesn't $HOME change if I use sudo?

I expected the -H option to give me the target user's environment. nbest@geo:~$ sudo -H -u tanum echo $HOME /home/nbest nbest@geo:~$ sudo -u tanum echo $HOME /home/nbest nbest@geo:~$ sudo -i -u tanum ...
Neil Best's user avatar
  • 283
18 votes
4 answers
104k views

Failed to connect to Mir: Failed to connect to server socket: No such file or directory

After logging in as another user how do I run GUI programs? thufir@doge:~$ thufir@doge:~$ sudo -u hawat -i hawat@doge:~$ hawat@doge:~$ whoami hawat hawat@doge:~$ hawat@doge:~$ pwd /home/hawat ...
Thufir's user avatar
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18 votes
1 answer
4k views

Get email notification for using 'sudo' by a specific user

I have a server set-up and I let somebody that I trust with a little bit of sudo access have it. However, I also want an email anytime that they use sudo. I know that I can use Defaults ...
user avatar
18 votes
6 answers
84k views

How to fix sudo after "chmod -R 777 /usr/bin"?

I entered chmod -R 777 /usr/bin and now sudo is not working. It says sudo must be setuid root. Some advice online said to run chown root:root /usr/bin/sudo chmod 4755 /usr/bin/sudo. On entering ...
Manojkumar's user avatar
18 votes
3 answers
65k views

Disable sudo permission to user from command line

I have activated root user in ubuntu and want to use ubuntu as server with no DE. For this I want to disable sudo privilege given to first user. How can I do this from command line ? I know I can use ...
sagarchalise's user avatar
18 votes
2 answers
11k views

What's the difference between login as user and changing users using su through root?

When you have a server of some sort you can access it through, e.g., ssh user1@ip and you can also do ssh root@ip to go to your root user with su priveleges and then go to su user1. In my thinking ...
Miguel Corti's user avatar
18 votes
1 answer
28k views

sudo, gksudo, kdesudo and their differences?

What is the difference between sudo, kdesudo and gksudo, and when should I use each? I know that sudo allows me to run both cli and gui functions, but I've seen other people on websites using kdesudo ...
SamuelH's user avatar
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18 votes
5 answers
10k views

How to make /sbin/shutdown, /sbin/reboot etc. require sudo again in 16.04?

For whatever reason, we do no longer need to be root (or using sudo) to run /sbin/shutdown, /sbin/reboot etc. This seems to be because those executables are now symlinks to /bin/systemctl which ...
Byte Commander's user avatar
  • 107k
17 votes
5 answers
19k views

File in /etc/sudoers.d/ not recognized

Running a fresh install of Ubuntu server 16.04.1, I tried to add a file in /etc/sudoers.d/ to give one user root privileges for a certain command. I added the file /etc/sudoers.d/servicetest with the ...
Cybran's user avatar
  • 339
17 votes
2 answers
31k views

What does sudo service do?

As far as I know and it seems that other people have the same opinion sudo is a command that executes something with administrative privileges. However when I run rcconf I can see this line: [*] ...
s3v3n's user avatar
  • 657
17 votes
1 answer
3k views

What does su > echo "<username>" mean?

When I was entering the command su > echo "sachin" it was asking for a password. When I gave my password, some strange things happened as you can see: One more thing: there is another user, ...
Sachin Setiya's user avatar
17 votes
2 answers
57k views

How to switch to root user but stay in the same directory

I recently switched to Ubuntu and I have observed one thing when I use the following command to switch to root user sudo su - root It takes me directly to root's home (/root), so I lose my place in ...
Hammad Hassan's user avatar
17 votes
9 answers
32k views

How to run an Application as another user?

I use krusader for file management stuff. the problem is that apache's DocumentRoot should be under chown www-data:www-data /path/to/www. so using krusader (which is run under my account) I've not ...
Alexar's user avatar
  • 1,396
17 votes
7 answers
13k views

How to prevent system applications (like the Software Center) from asking for password?

I'd like Software Center, Update Manager and some other system management applications to work without asking for password (like sudo does if configured with NOPASSWD) but only asking for a ...
Ivan's user avatar
  • 57k
17 votes
1 answer
40k views

sudo does not ask for password [duplicate]

Whenever I issue command sudo apt-get install foo it does not ask for password. is it because of user groups? How to make it prompt for password? Edit: My sudoers file apple@Ascension:~$ sudo cat /...
Rahul Virpara's user avatar
16 votes
3 answers
8k views

Is ./ (dot slash) a command?

Core of the question: The question arose while I could not install the software, so I am genuinely asking about ./ because I didn't know about it and the output "command not found" was confusing me ...
ubuntubu's user avatar
  • 433
16 votes
4 answers
113k views

How to check if running as root? Not asking for sudo

I am a new Ubuntu user and am still getting used to the OS. I have been using it primarily for local testing of a site that I am developing. I downloaded the LAMP stack for this. When I first ...
Chris's user avatar
  • 163
16 votes
3 answers
64k views

What's the difference between 'sudo [command]' and 'sudo sh [command]?

I'm trying to install VMware Workstation in my Ubuntu 12.04.2 LTS. If I execute the following command: sudo ./VMware-Workstation-9.0.1-894247.x86_64.bundle it finishes at once and the installation ...
Landy's user avatar
  • 163
16 votes
3 answers
6k views

Where is the login shell defined?

I was reading difference between sudo -i/-s here. After using command shopt it is noted that all(sudo su/sudo -i/sudo -s) the $SHELL are providing same results, but shopt command results are different....
prado's user avatar
  • 275
16 votes
1 answer
28k views

Cannot lock '/etc/group' in recovery mode

I've currently booted into recovery mode, because I removed my sole user from admin :/ When I run adduser oadams admin, I get gpasswd: cannot lock /etc/group; try again later. For what it's worth, ...
oadams's user avatar
  • 1,301
16 votes
2 answers
23k views

Let normal user restart service with /etc/sudoers

I have a service (kado-demo.service) that a normal user (kado) should be able to restart without entering any password. I created /etc/sudoers.d/user_restart and added kado ALL=NOPASSWD: /bin/...
FooTheBar's user avatar
  • 303
16 votes
3 answers
6k views

pipe to sudo -E bash -

I was wondering what is the purpose of piping the downloaded file by curl into sudo -E bash - in the following shell: curl -sL https://deb.nodesource.com/setup_5.x | sudo -E bash -
youssef's user avatar
  • 353
16 votes
1 answer
45k views

Is /etc/sudoers file only suppose to have read only permissions?

-r--r----- 1 root root 723 Jan 31 2012 sudoers My dist-update frequently fails. At boot my system frequently asks for file system check. (My system-hardware is file) I am using vksTP 3....
Vivek Sharma's user avatar
  • 1,170
16 votes
1 answer
3k views

What happens if you use @reboot reboot in crontab file?

What would happen if you use: sudo crontab -e And add the line: @reboot reboot Will it go into a infinite loop of rebooting?!
PascalVKooten's user avatar
16 votes
2 answers
75k views

Open file or application as root from GUI

Is it possible to open a file or application as root from the GUI? My ideal would be right-clicking on a file or an application and seeing an "Open as Root" choice in the context menu, after which I ...
chrsmrrtt's user avatar
  • 161
16 votes
3 answers
27k views

Best practices on using sudo in a bash script

I have a long and long-running bash script where a handful of commands need to be run as root while the majority of commands need to be run as the regular user before sudo, because it would mess up ...
Dakkaron's user avatar
  • 274
15 votes
2 answers
43k views

"~/.wine is not owned by you", am I safe?

So I was running about trying to install something in wine when I encountered the suggestion to use sudo to get administrator privileges. That's when I got the above message ~/.wine is not owned by ...
Miko's user avatar
  • 179
15 votes
4 answers
6k views

I change the last line in /etc/passwd and I can't use sudo

Here is what I have done: Change a username in the last line: tiny to abc tiny@tty7:~$ sudo vim /etc/passwd Change this: tiny:x:1000:1000:tiny,,,:/home/tiny:/bin/bash to this: abc:x:1000:1000:tiny,,,...
tinyork's user avatar
  • 153
15 votes
2 answers
190k views

Launch Sublime Text 2 from terminal [duplicate]

I am new to Ubuntu and is trying to configure my environment so i can launch Sublime Text 2 directly from the terminal. I followed the solution on this post but no luck so far. These are steps I did (...
CYC0616's user avatar
  • 151
15 votes
2 answers
12k views

Upgrade sudo to 1.9.5p2 version due to CVE-2021–3156 vulnerability [duplicate]

How do I upgrade sudo to version 1.9.5p2? I use Ubuntu 20.04. I have already tried: sudo apt-get update sudo apt-get upgrade But I am still on version 1.8.31.
Lochness's user avatar
  • 171

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